165223806 has 24 divisors (see below), whose sum is σ = 363220872. Its totient is φ = 50067600.

The previous prime is 165223801. The next prime is 165223811. The reversal of 165223806 is 608322561.

It is an interprime number because it is at equal distance from previous prime (165223801) and next prime (165223811).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165223801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113065 + ... + 114516.

It is an arithmetic number, because the mean of its divisors is an integer number (15134203).

Almost surely, 2^165223806 is an apocalyptic number.

165223806 is an abundant number, since it is smaller than the sum of its proper divisors (197997066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165223806 is a wasteful number, since it uses less digits than its factorization.

165223806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227608 (or 227597 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 165223806 is about 12853.9412632857. The cubic root of 165223806 is about 548.7285295917.

The spelling of 165223806 in words is "one hundred sixty-five million, two hundred twenty-three thousand, eight hundred six".